[The “Hōkikō Gobō Shōsoku” is a letter written by Nichirō by order of Nichiren and it is addressed to Nikkō.]

A passage composed of the 28 Chinese characters that states, “The Lotus Sūtra is good medicine for the diseases of people of the Jambudvīpa; if a patient can hear this sūtra, his disease will disappear at once, and he will neither grow old nor die,” is taken from the “Medicine King Bodhisattva” chapter of the Lotus Sūtra. When Nichiren’s wet nurse who had a serious illness for about a year died, Nichiren Shōnin chanted this passage and placed it in her mouth with pure water. It revived her at once. Lord Nanjō Tokimitsu is not a high-ranking samurai but he is a devoted follower of Nichiren Shōnin. It would be better for him to pray to King Yama beseeching for help just this once, though it might be his karma from his previous life. As a way of curing his illness, please get a cup of pure water from the Shōnin River between 4 a.m. and 8 a.m., write down the 28 character passage of the “Medicine King Bodhisattva” chapter on a piece of paper and burn it. Then, please mix the ashes in the water and have him drink it.

Hōkikō Gobō Shōsoku, Letter to Nikkō, Writings of Nichiren Shōnin, Volume 5, Pages 209-210